06-10-2018 10:52
Solved! Go to Solution.
06-11-2018 06:56
06-11-2018 08:39 - edited 06-11-2018 08:42
The engine will use extra oil for about 2 hours when running above 2000 rpm. The oil tank fill spout holds quite a bit of oil if you fill up to the cap and the level sender displays only specific percentages, it is not a continuously changing reading like most fuel gauges. It does take a while to use up the oil in the fill spout and the upper area of the tank before the gauge shows below 100%.
To determine if everything is operating as it should. Fill the boat tank and the oil tank to the top and run the boat keeping track of the hours and the gallons used and gallons added to the tank. From those figures you should have an average fuel - oil usage that you can refer to.
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
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The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.
06-11-2018 08:59
06-11-2018 09:01
06-11-2018 11:38 - edited 06-11-2018 11:48
The recommended operating rpm range for this motor is 5400-6000 rpm. 5200 is too low. Overpropping an engine will cause excess oil consumption. You should shoot for at least 5600 rpm, which means you need to reduce the pitch of your prop.
A viper on a boat like that is a very poor choice. You need an rx4 or a rebel. They don't make a 17 inch rx4 I would suggest a 16 inch rx4 or a 17 inch rebel, based on your viper results.
I think water pressure gauges have recently become very popular, I agree, all manufactures should include one, but they don't.
06-12-2018 07:12
A water pressure gauge is an optional item on all makes of outboard motors, not just Evinrude.
An RX4 prop that allows your engine to turn up close to the 6000 rpm redlines with a light load would be the ideal situation for a large pontoon boat like yours. That way when you load it up with people and gear, the motor will not be lugging or struggling to keep it on plane.
Propping is trial and error but as mentioned already, a 16" RX4 would be a good starting point.
5200 rpm max is overloading the motor and the computer controlled oiling system is adding more to help protect the engine. That is why consumption appears to be excessive.
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
***************
The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.
06-12-2018 10:20
06-18-2018 10:20
06-18-2018 11:50
You have to get the rpm where it should be first. Insist on it
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
***************
The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.